16. How they can watch a football game, and then watch the highlights on Match of the Day that same night

17. Why they have to 'readjust' themselves in public

18. Their obsession with sex

19. How they can remember endless sports stats but forget important details such as birthdays etc

20. Why they need to have a 50-inch TV

21. Why they never want to show their emotions

22. Their obsession with boobs

23. Their obsession with gadgets

24. Why they can't understand why you're always right

25. Why they leave towels lying on the floor 'to dry'

26. Why men read on the toilet

27. Why they insist on trying to fix things themselves rather than calling in a professional

28. How they always manage to spend more money than you when it's their turn to do the food shop

29. Why they think women like being wolf-whistled at

30. Their obsession with being in charge of a barbecue

31. Why they don't ask the right questions

32. Why they have to show off in front of their friends

33. Why they leave the recycling next to the bin/box/sink instead of in it

34. Why they always have to be the one to drive, apart from when they want to drink

35. Lad culture and boys' nights out

36. Why they leave things to soak, and then declare they've 'done' the washing up

37. Why they stay up late watching YouTube/TV or playing computer games and then complain that they are too tired to go to work

38. Why they get moody when their girlfriend wants to watch a girly TV show but then when the football is on there is no question about it

39. Why they insist on having their own chair/their own side of the sofa

40. Why they have to have a fast car

41. Their love of cars/engines and motorbikes

42. Why they have to watch something in HD

43. Why they put their arm around the back of the passenger seat when they are reversing

44. How the first thing they try on when clothes shopping is always the perfect fit

45. Why they refer to their favourite football team as 'we'

46. How they can happily spend so much time in a shed or garage

47. How they can claim to be a better cook than you, despite rarely cooking

48. Why they say they are going to call if they aren't

49. Why they get so competitive with their friends

50. Why they pretend they hate the cat / dog but everyone knows they love it the most.

A spokesman for online market researchers OnePoll, which commissioned the research, said: "Women are often said to be the more complicated sex, but it seems men still have their unexplainable traits.

"Men and women are often very different - in the way they behave, communicate, express their emotions and deal with problems. But this can leave women struggling to understand why men do certain things.

"Man flu in particular is always a bone of contention, especially for couples. While women are known to struggle on while suffering a cold, men always seem to come down with a stronger bug that knocks them for six."